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#95279 - 09/06/05 04:00 PM Overload?
jes Offline
Member
Registered: 07/12/02
Posts: 103
Loc: CT
15 Amp, 125 volt branch circuit with duplex 15 Amp, 125 volt receptacles. Plugged into a single duplex are two 6.5 Amp (nameplate) commercial referigerators, one into each position. For the sake of discussion there are no other loads. Does this violate ANY ratings or NEC requirements?
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#95280 - 09/06/05 04:14 PM Re: Overload?
luckyshadow Offline
Member
Registered: 01/04/05
Posts: 305
Loc: Maryland USA
I would say no.
I believe a refrigerator is not a continuous load ( on for 3 or more hours). The compressor will cycle on and off but should not run continuous.
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#95281 - 09/06/05 05:27 PM Re: Overload?
Redsy Offline
Member
Registered: 03/28/01
Posts: 2056
Loc: Bucks County PA
210.21(B)(2)
If the "duplex" receptacle is considered 2 receptacles, (and I believe it is) you would have a violation.
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#95282 - 09/06/05 05:42 PM Re: Overload?
Roger Offline
Member
Registered: 05/18/02
Posts: 1716
Loc: N.C.
Redsy, since this is in fact two receptacles, neither one would be loaded to the maximum limit of Table 210.21(B)(2) for a 15 amp receptacle.

Roger
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#95283 - 09/06/05 06:24 PM Re: Overload?
Redsy Offline
Member
Registered: 03/28/01
Posts: 2056
Loc: Bucks County PA
OK, so it's per each receptacle?
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#95284 - 09/06/05 07:40 PM Re: Overload?
George Little Offline
Member
Registered: 01/18/04
Posts: 1488
Loc: Michigan USA
No overload, no violation but poor design. Just a matter of time before both units start at the same time and that could spell problem.
_________________________
George Little
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#95285 - 09/08/05 02:27 AM Re: Overload?
jes Offline
Member
Registered: 07/12/02
Posts: 103
Loc: CT
And no argument...

To change the question slightly...
Suppose the duplex were split and each receptacle had it's own 15 Amp circuit.
A load of 12 Amps could be connected to each, giving a total current of 24 amps through a standard, everyday, less than $1, duplex receptacle, correct?
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#95286 - 09/08/05 03:50 AM Re: Overload?
iwire Offline
Moderator
Registered: 01/05/03
Posts: 4391
Loc: North Attleboro, MA USA
Yes that is correct.

Now how long would that cheap receptacle would last is another question altogether.
_________________________
Bob Badger
Construction & Maintenance Electrician
Massachusetts
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